Stormwater Inundation Analysis in Small and Medium Cities for the Climate Change Using EPA-SWMM and HDM-2D

• DOI: 10.2112/si85-199.1
• Publication Date: 2018-08-09T17:53:23Z
• Authors: Sung Eun Kim; Sangeun Lee; Dongwook Kim; Chang Geun Song
• Keywords: Low-impact development; Flash flood

Kim, S.E.; Lee, S.; D., and Song, C.G., 2018. Stormwater Inundation Analysis in Small Mediun Cities for the Climate Change Using EPA-SWMM HDM-2D. In: Shim, J.-S.; Chun, I., Lim, H.S. (eds.), Proceedings from International Coastal Symposium (ICS) 2018 (Busan, Republic of Korea). Journal Research, Special Issue No. 85, pp. 991–995. Coconut Creek (Florida), ISSN 0749-0208.The increase rainfall intensity flash-flood due to climate change are expected exacerbate flood inundation urban area. Especially, small medium cities lacking drainage facilities more vulnerable than large cities. This study introduces a simplified stormwater simulation modelling two medium-sized located South Korea using U.S. Environmental Protection Agency (EPA) Storm Water Management Model (SWMM) HydroDynamic Model-2D(HDM-2D). model which widely used runoff analysis areas containing pipe network, was calculate flow surcharged overflow existing network. Then, 2-D model, HDM-2D coupled with 1-D simulate propagation areas. The 1-D/2-D calibrated real events applied analyze effect on 30-year frequency design calculated by RCP 4.5 IPCC RCPs. In based simulation, small-scale flooding rapidly propagated within hours after occurrence surcharge overflow. wave highly related interaction topographical obstacles as road, bottom elevation or slope.